[  514.152400] bond0: (slave eth0): making interface the new active one
[  514.152495] bond0: (slave eth0): Enslaving as an active interface with an up link
[  518.369919] bond0: (slave eth0): Releasing backup interface
[  518.480348] bond0: (slave eth0): Enslaving as an active interface with an up link
[  522.655045] bond0: (slave eth0): Releasing backup interface
[  522.680999] bond0 (unregistering): Released all slaves